The chimp didn’t feel well. She fell over, ignoring the other wild chimps. Finally, the sick chimp crawled over to a bush, picked some leaves and swallowed them. By the next afternoon, the chimp was as good as new!

Biologists watching the chimp were surprised. Somehow, the plant had cured the chimp! Did the chimp know the plant would make her feel better? Or was it just a lucky accident?

Many scientists don’t think it has anything to do with luck. They’re discovering that some animals seem to use plants to cure themselves. And these animals are leading scientists to new plants that could cure humans!

Dr. Richard Wrangham, an anthropologist at Harvard University, agrees that animals may know something we don’t know about forest plants.

Wrangham got to know chimps and their diets while studying them for three years in Tanzania. “You must know a lot about an animal’s feeding habits to know what it doesn’t consider food,” Wrangham explains. Every morning, he saw that most chimps ate fruit near their nests. Later on, they ate on leaves.

When he noticed chimps eating the leaves of a plant they usually ignored, Wrangham thought something interesting was going on---especially when he saw that they’d sometimes walk for 20 minutes to find the plant. Another strange thing that caught his eye was how they ate the bitter leaves.

“They swallowed the leaves whole,” explains Wrangham, noting that chimps usually chew their food well. “They seemed to rub(摩擦)the leaves around the roofs of their mouths. They closed their eyes, wrinkled their noses and swallowed slowly. ”

Wrangham wondered what could be so good about something tasting so bad. He had a chemist analyze the leaves. He discovered that the leaves contain a red oil that kills different viruses(病毒). Later tests showed that the oil might even fight cancer and the AIDS virus!

Why don’t the chimps chew the leaves? “Rubbing the leaves between the tongue and the inside of the mouth might allow the chemicals to enter the bloodstream directly,” he suggests, “instead of going to the stomach, where they might get destroyed by acids. The chimps seem to know what they’re doing.”

1.We can learn from the passage that _________.

A. chimps cure themselves by chewing plants

B. chemicals in plants help cure animals

C. scientists live with chimps to study their diets

D. Dr. Wrangham knows a lot about forest plants

2.How can Dr. Wrangham tell which plants are medicine for chimps?

A. By talking with the biologists.

B.. By studying the chimps’ feeding habits.

C. By analyzing the chimps’ favorite food.

D. By comparing other scientists’ discoveries.

3.The author wrote the passage to ___________.

A. provide a solution B. test a theory

C. present a finding D. describe an experiment

4.What does the passage mainly talk about?

A. Animal doctors. B. Forest plants.

C. Chimp’s diets. D. A cure for cancer.

練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:2015-2016學(xué)年山西大同第一中學(xué)高二上學(xué)期期中英語試卷(解析版) 題型:七選五

根據(jù)短文內(nèi)容,從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。

How to Improve Vocabulary Fast

Your vocabulary refers to the words in a language you are familiar with. We should learn some ways to expand it.

Read every day. 1. Choose reading material that is slightly above your level and keep a dictionary with you to look up words you do not know.

2. If you do not meet with an unfamiliar word in your daily reading, use your dictionary to search for one.

Learn the correct definition and pronunciation for each new word. Pronunciation is as important as definition because in order to add a word to your active vocabulary, you must be able to use it in speech.

Elaborate(闡釋)on the meaning of the word. Use imagery and personal relevance. If you have just learned the word “stubborn”, think about the neighbor who will not lend you his car. 3.

Use your new word in speech and in writing. E-mail your sister about how your cat is stubborn about sleeping on your pillow. 4. But the more you use it, the more fluent you will become in its use. Soon it will be a regular part of your active vocabulary.

Tell everyone you are trying to increase your vocabulary. Encourage them to ask you what your latest word is. 5. The more you explain the meaning of a word to someone, the more likely you are to remember it.

A. Or let them ask for the definition of a new word you have used.

B. Your vocabulary contains the words you understand.

C. The vocabulary can be increased.

D. Imagine him shaking his head, and think of him as “stubborn in his refusal”.

E. The first time you use a new word in speech, it may seem clumsy and forced.

F. Find a new word every day

G. The more often you read, the faster your vocabulary can grow.

查看答案和解析>>

科目:高中英語 來源:2015-2016學(xué)年湖南株洲第十八中學(xué)高一上學(xué)期第一次月考英語試卷(解析版) 題型:短文改錯

短文改錯

假定英語課上老師要求同桌之間交換修改作文,請你修改你同桌寫的以下作文。文中共有10處語言錯誤,每句中最多有兩處,每處錯誤僅涉及一個單詞的增加、刪除或修改。

增加:在缺詞處加一個漏字符號(∧),并在其下面寫出該加的詞。

刪除:把多余的詞用斜線(\)劃掉。

修改:在錯的詞下劃一橫線,并在該詞下面寫出修改后的詞。

注意:1. 每處錯誤及其修改均僅限一詞;

2. 只允許修改10處,多者(從第11處起)不計分。

Yang Li, a five-year-old girl living next door to me, very clever. Because she is not old enough to go to the school, she often asks me to teach herself to read, write and draw. She studies hardly and soon she learns a lot. One evening last month I was doing my English homeworks when she came to my house. She asked me how I learned English. “You would find English a bridge for so many knowledge,” I said. She then wanted to learn English, either. She has learned many English words so far but her parents are very grateful to me.

查看答案和解析>>

科目:高中英語 來源:2015-2016學(xué)年江西贛州贛縣中學(xué)北校區(qū)高一12月月考英語試卷(解析版) 題型:語法填空

閱讀下面短文,按照句子結(jié)構(gòu)的語法性和上下文連貫的要求,在空格處填入一個適當(dāng)?shù)幕蚴褂美ㄌ栔性~語的正確形式填空,并將答案填寫在答題卷相應(yīng)位置上。

This is my story of friendship. About two years ago, I was really just a happy guy 1. stress. However, one day in the fourth grade, all things changed. My best friend and I got into 2. big fight and didn’t talk to each other for a year. After that, I got really sad and had many thoughts 3. (kill) myself. A few weeks after the fight, my first best friend, 4. I met in daycare, helped me a lot. I hadn’t talked to him for a really long time, but he still took me in and 5. (hang) out with me and made me feel 6. (good). Another year later, I had lost almost all my self-confidence and I cruelly treated 7. (me), from pulling my own hair to 8. (hurt) myself. At this period, I also got looked down upon a lot. And again, my best friend came to help me. Since then I have made a promise 9. I will never hurt myself. This taught me the value of friendship and how 10. (power) it can be. Without my best friend, I might not be here today.

查看答案和解析>>

科目:高中英語 來源:2015-2016學(xué)年河南許昌四校高二上學(xué)期第三次聯(lián)考英語試卷(解析版) 題型:書面表達

書面表達

某英文雜志正在進行主題為“如何正確面對網(wǎng)絡(luò)信息”的征文活動,請你根據(jù)以下提示,用英語寫一篇短文應(yīng)征。

1. 網(wǎng)絡(luò)信息的特點;2. 如何分辨信息的真假;3. 如何處理不同的信息。

注意:1. 詞數(shù)100左右(開頭已為你寫好,但不計入總詞數(shù));

2. 可適當(dāng)增加細節(jié),以使行文連貫。

The Internet can be seen as a great source of information.

查看答案和解析>>

科目:高中英語 來源:2015-2016學(xué)年云南云天化中學(xué)高一12月月考英語試卷(解析版) 題型:短文改錯

文中共有10處語言錯誤,每句中最多有兩處,每處錯誤僅涉及一個單詞的增加、刪除或修改。

增加:在缺詞處加加一個漏字符號(Λ),并在其下面寫出該加的詞。

刪除:把多余的詞用斜線(\)劃掉。

修改:在錯的詞下劃一橫線,并在該詞下面寫出修改后的詞。

注意:1. 每處錯誤及其修改均限一詞。

2. 只允許修改10處,多者(從第11處起)不計分。(試題內(nèi)容見答題卡)

Dear teachers and students,

As we know, air pollution is serious environmental problem in our city. Every day we had to take in very dirty air, which isn’t good for our healthy. To make sure the air fresh, we should keep the following suggestions on mind. Firstly, we should take a bus or ride a bicycle as much as possible instead of drive a car. Secondly, we shouldn’t throw litter here and there but put them into the dustbin. Thirdly, some factories should be closed and moved out of the city. Finally, we need to plant many trees to make the air fresher. Let’s take action and try your best to make the air in the city cleaner!

Thank you!

The Students’ Union

查看答案和解析>>

科目:高中英語 來源:2015-2016學(xué)年云南云天化中學(xué)高一12月月考英語試卷(解析版) 題型:閱讀理解

The ancient city is in Pingyao county, Shanxi Province. The city wall was first built during the Zhou Dynasty. Since 1997, it has been listed as a World Heritage Site. Now Pingyao city is the only one in China completely protected as it was hundreds of years ago.

The perimeter(周長) of this square city is 6.4km long and the city wall is the earliest and largest city wall in China. It is 12 m high with width of 5 m. The wall was built with earth and covered with bricks. Outside the city wall there is a river, 4 m wide and 4 m deep.

There are several gates of the city, two each on the east and west and one each on the south and north side. All the gates have two doors each. This has given the city the name “Turtle City” with the two gates on the south and north standing for the head and tail of the turtle and four gates on the east and west as the four legs. The doors on the south and north stand opposite each other, like the head of the turtle extending out and two wells just beyond southern gate are like a turtle’s two eyes.

Located on the trade route between Beijing and Xi’an, Pingyao developed into a merchant center where the local people set up the nation’s earliest banks. These banks were the first in China to use checks.

Several old courtyards have been turned into museums, most of which were homes and offices of Pingyao’s old banks. One of the most unusual aspects of a visit here is realizing that this place was very important to China’s financial(金融的) history.

1. What does the passage mainly talk about?

A. The ancient city—Pingyao.

B. China’s ancient financial center—Pingyao.

C. The city wall of Pingyao.

D. The museums in Pingyao.

2.How many gates are there in Pingyao city?

A. Four. B. Five. C. Six. D. Seven.

3.Which gate in Pingyao city stands for the head of the turtle?

A. The gate on the north.

B. The gate on the south.

C. The gate on the east.

D. The gate on the west.

4. It can be inferred from the last two paragraphs that__________.

A. Pingyao city played an important role in ancient China’s finance.

B. museums in Pingyao city are now used for bank offices.

C. Pingyao city was one of the largest cities in ancient China.

D. old banks in ancient Pingyao city used checks only.

查看答案和解析>>

科目:高中英語 來源:2016屆寧夏回族自治區(qū)銀川一中高三上第五次月考英語試卷(解析版) 題型:閱讀理解

A paperclip,made of steel wire bent into a looped (環(huán)形的)shape,is an instrument used to hold sheets of paper together.This common device is a wonder of simplicity and function.But where did this simple,cheap,and practical invention come from?

In the late 19th century,the most common way to hold papers together was by using a pin.Although the pin was an inexpensive tool and was easily removable,it would 1eave holes in the paper. Later,as steel wire became more common,inventors began to notice its elastic(有彈性的)feature. With this feature,it could be stretched and twisted into various clip—like objects.In the years just before 1900,quite a few paperclip designs appeared.The name most frequently associated with the paperclip invention is Johan Vaaler,a Norwegian inventor. However, Vaaler’s clips were not the same as the paperclips currently in use.Specifically,they did not have the inside loop we see today.The familiar looped design was invented by Gem Manufacturing Ltd.in England.This clip is therefore sometimes known as the Gem clip.

Because of Vaaler,the paperclip played an important historical role in Norway.During World War II,Norway was occupied by the Nazis.Norwegians were prohibited from wearing any symbol of their national unity(團結(jié)),such as buttons with the initials of their king.Thus,in protest,they started wearing paperclips to show their unity.The reason for doing this was simple:Paperclips were a Norwegian invention whose original function was to bind together.After the war,a giant paperclip statue was put up in Oslo to honour Vaaler—even though his design was never actually produced.

1.According to the first paragraph,the paperclip is________.

A.made of paper

B.shaped like a pin

C.inexpensive and useful

D.for holding clothes together

2.One way the paperclip is better than the pin is that_________

A.it is cheaper

B.it is simpler

C.it can be removed more easily

D.it doesn’t damage the paper

3.Which of the following best shows what the Gem clip looks like?

4.The last paragraph is mainly about_________.

A.how Vaaler’s clip became a national symbol

B.how widely used Vaaler’s clip is

C.how the Nazis ruled the Norwegian people

D.why Norwegians had the initials of their king on their buttons

查看答案和解析>>

科目:高中英語 來源:2015-2016學(xué)年內(nèi)蒙古赤峰二中高二上第二次月考英語試卷(解析版) 題型:閱讀理解

Photographs are everywhere. They decorate the walls of homes and are used in stores for sales of different goods. The news is filled with pictures of fires, floods, and special events. Photos record the beauties of nature. They can also bring things close that are far away. Through photos, people can see wild animals, cities in foreign lands, and even the stars in outer space. Photos also tell stories.

Reporting the news through photos is called photojournalism. At times photojournalists tell their stories through a single picture. At other times, they use a group of pictures to tell a story. Each picture is like a chapter in a book, which can do more than record the facts. It can also be a strong force for social change.

Jacob Riis was among the first photojournalists. He took pictures of parts of New York City where the poor lived. Riis believed that poverty caused crime, and he used photos to help him prove his point. A few years later, the photos of small children working in factories by Lewis Hine shocked the public. Hine’s pictures helped bring about laws to protect such children.

Hundreds of pictures may have to be taken in order to get one or two really good photos. It takes science to have the photo come out clearly and art to make a photo that has a good design and expresses feeling. Photojournalists make an actual record of what they see. A photo, however, can be both a work of art and an actual record. It can record an important event as a beautiful or exciting picture.

As historical and artistic documents, photos can become more important over time. Today photojournalists still have their pictures appear in newspapers and magazines. They also publish(發(fā)表) them in books and on the Internet.

1.The underlined word “They” in the first paragraph refers to .

A. beauties B. photos

C. goods D. events

2.The photos of the small children by Hine show us that photos .

A. are also works of art

B. are popular ways of reporting news

C. often shock the public

D. can serve as a force for social change

3.What can we learn from the passage?

A. News with pictures is encouraging

B. Photos help people improve.

C. News photos mean history in a sense.

D. People prefer reading news with pictures.

4.The text is mainly about .

A. telling the story through pictures

B. decorating the walls of homes

C. publishing historical papers

D. expressing feeling through pictures

查看答案和解析>>

同步練習(xí)冊答案